Portion of a shoe midsole



FIG. 1 is a perspective view of a portion of a shoe midsole showing mynew design;

FIG. 2 is a side view thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is a rear view thereof.

The uneven broken line showing of the remainder of the shoe sole is forillustrative purposes only and forms no part of the claimed design.

The ornamental design for a portion of a shoe midsole, as shown anddescribed.